When the northern wolf demon tribe fell under attack from a vicious badger demon, only Shinta and Kai were able to survive. Kai was injured while protecting his brother from the demon, prompting the arrival of the badger's master, Byakuya, an incarnation of Naraku. Shinta was taken hostage so that Kai would be forced to take Kōga's jewel shards and use them as ransom payment.

When Kai brought Kōga himself back to Byakuya, Byakuya sent Shinta with a moth demon; it released vast amounts of demonic energy, luring Mōryōmaru to it. Shinta was caught by Mōryōmaru and almost eaten by him; however, Kai and Kōga saved him at the cost of Kai losing the shard Byakaya gave him.

In the last episode of The Final Act, he and his brother attended Kōga's wedding with Ayame.

Shinta had short, bluish-black hair and black eyes; his eyes were similar to that of a doll. He wore fur like all wolf demons, but had a hood with the shape of a wolf's ears on it. He tied his fur at the waist with a black belt, just like Kai.